Results 21 to 30 of about 13,645 (194)

Acoustic Metamaterials and Acoustic Foams: Recent Advances [PDF]

Applied Sciences, 2022
Acoustic metamaterials are synthetic materials, made of repeating unit cells that are designed to address an acoustic problem, through the rational design of their micro-features [...]
Reza Hedayati, Mahdi Bodaghi
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A review of underwater acoustic metamaterials for underwater acoustic equipment

Frontiers in Physics, 2022
Researchers use underwater acoustic equipment to explore the unknown ocean environment, which is one of the important means to understand and utilize the ocean.
Zhenjing Zhu, Zhenjing Zhu, Ning Hu, Ning Hu, Junyi Wu, Wenxin Li, Wenxin Li, Jiabao Zhao, Jiabao Zhao, Maofa Wang, Maofa Wang, Maofa Wang, Fanzong Zeng, Fanzong Zeng, Huajie Dai, Huajie Dai, Yongju Zheng, Yongju Zheng   +17 more
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Review and prospects of metamaterials used to control elastic waves and vibrations

Frontiers in Physics, 2022
Acoustic metamaterials, artificial composite structures with exotic material properties used to control elastic waves, have become a new frontier in physics, materials science, engineering and chemistry.
Huajie Dai, Huajie Dai, Xueting Zhang, Yongju Zheng, Yongju Zheng, Wanrong Pei, Rougang Zhou, Rong Liu, Youping Gong   +8 more
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Control the structure to optimize the performance of sound absorption of acoustic metamaterial: A review

AIP Advances, 2021
Acoustic metamaterials achieve the function of absorbing sound through equivalent negative parameters and bandgaps. Sound absorption is closely related to structural design.
Yan Du, Weiguo Wu, Wei Chen, Yongshui Lin, Qingjia Chi   +4 more
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Bandgap optimization for chiral acoustic metamaterials based on material selection method

Zhongguo Jianchuan Yanjiu, 2023
ObjectivesThis study seeks to expand the bandgap frequency band, reduce the bandgap starting frequency and analyze and optimize the bandgap parameters of acoustic metamaterials.
Luyun CHEN, Xing XIE
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Transcranial Acoustic Metamaterial Parameters Inverse Designed by Neural Networks

BME Frontiers, 2023
Objective: The objective of this work is to investigate the mapping relationship between transcranial ultrasound image quality and transcranial acoustic metamaterial parameters using inverse design methods.
Yuming Yang, Dong Jiang, Qiongwen Zhang, Xiaoxia Le, Tao Chen, Huilong Duan, Yinfei Zheng   +6 more
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Efficient Modelling of Acoustic Metamaterials for the Performance Enhancement of an Automotive Silencer

Acoustics, 2022
Significant potential for acoustic metamaterials to provide a breakthrough in sound attenuation has been unlocked in recent times due to advancements in additive manufacturing techniques.
Daniel Deery, Lara Flanagan, Gordon O’Brien, Henry J. Rice, John Kennedy   +4 more
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Acoustic metamaterials [PDF]

Physics Today, 2016
By incorporating novel subwavelength structures into macroscopic materials, acousticians can create devices with exotic sound-altering properties.
Michael R. Haberman, Matthew D. Guild
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Recent Advances in Acoustic Metamaterials for Simultaneous Sound Attenuation and Air Ventilation Performances

Crystals, 2020
In the past two decades, acoustic metamaterials have garnered much attention owing to their unique functional characteristics, which are difficult to find in naturally available materials. The acoustic metamaterials have demonstrated excellent acoustical
Sanjay Kumar, Heow Pueh Lee
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Improving the Directionality of Low-Frequency Acoustic Radiation by a Finite Array of Quadrupolar Sources with Acoustic Metamaterials

Crystals, 2023
Manipulating radiation patterns is challenging, especially at low frequencies. In this paper, we demonstrate that acoustic metamaterials arranged as an array of quadrupoles remarkably improve the directionality of acoustic radiation at low frequencies ...
Qinglei Zeng, Shenlian Gao, Yun Lai, Xiaozhou Liu   +3 more
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